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| author | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2009-10-31 15:22:27 +0000 |
|---|---|---|
| committer | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2009-10-31 15:22:27 +0000 |
| commit | a95d728fc36f0d96c08a78b6af543a440217d3a4 (patch) | |
| tree | 81b235e8989ec1ea612bafc803da751834cd15a8 /os/io/platforms/STM32/stm32_dma.c | |
| parent | 43f9fd4180030081daae9122bd57a521ec9c58e1 (diff) | |
| download | ChibiOS-a95d728fc36f0d96c08a78b6af543a440217d3a4.tar.gz ChibiOS-a95d728fc36f0d96c08a78b6af543a440217d3a4.tar.bz2 ChibiOS-a95d728fc36f0d96c08a78b6af543a440217d3a4.zip | |
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1259 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/io/platforms/STM32/stm32_dma.c')
| -rw-r--r-- | os/io/platforms/STM32/stm32_dma.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/os/io/platforms/STM32/stm32_dma.c b/os/io/platforms/STM32/stm32_dma.c new file mode 100644 index 000000000..d78a058d9 --- /dev/null +++ b/os/io/platforms/STM32/stm32_dma.c @@ -0,0 +1,89 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
+
+ This file is part of ChibiOS/RT.
+
+ ChibiOS/RT is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ ChibiOS/RT is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file stm32_dma.c
+ * @brief STM32 DMA helper driver code
+ * @addtogroup STM32_DMA
+ * @{
+ */
+
+#include <ch.h>
+
+#include "stm32_dma.h"
+
+static cnt_t dmacnt1;
+#if defined(STM32F10X_HD) || defined (STM32F10X_CL)
+static cnt_t dmacnt2;
+#endif
+
+/**
+ * @brief STM32 DMA helper initialization. + */
+void dmaInit(void) {
+
+ dmacnt1 = 0;
+#if defined(STM32F10X_HD) || defined (STM32F10X_CL)
+ dmacnt2 = 0;
+#endif
+}
+
+/**
+ * @brief Enables the specified DMA controller clock.
+ * + * @param[in] dma the DMA controller id + */
+void dmaEnable(uint32_t dma) {
+
+ switch (dma) {
+ case DMA1_ID:
+ if (dmacnt1++ == 0)
+ RCC->AHBENR |= RCC_AHBENR_DMA1EN;
+ break;
+#if defined(STM32F10X_HD) || defined (STM32F10X_CL)
+ case DMA2_ID:
+ if (dmacnt2++ == 0)
+ RCC->AHBENR |= RCC_AHBENR_DMA2EN;
+ break;
+#endif
+ }
+}
+
+/**
+ * @brief Disables the specified DMA controller clock.
+ *
+ * @param[in] dma the DMA controller id
+ */
+void dmaDisable(uint32_t dma) {
+
+ switch (dma) {
+ case DMA1_ID:
+ if (--dmacnt1 == 0)
+ RCC->AHBENR &= ~RCC_AHBENR_DMA1EN;
+ break;
+#if defined(STM32F10X_HD) || defined (STM32F10X_CL)
+ case DMA2_ID:
+ if (--dmacnt2 == 0)
+ RCC->AHBENR &= ~RCC_AHBENR_DMA2EN;
+ break;
+#endif
+ }
+}
+
+/** @} */
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